Improvement in machine for grinding and polishing marble



J.H.VOLK. MACHINE FOR GRINDING AND POLISHING MARBLES. No. 102,184. Patented Apr. 19, 1870.

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l itinitrd swat Katmai Gililiiira Letters Patent No. 102,184, dated April 19, 18a).

IMPROVEZQEN'P m MACHINE IOR GRINDING AND POLISHING MARBLE.

The Schedule referred to in these Letters Patent and making part'of the same.

.To all whom it may concern:

Be it known that. I, JOHN H. VOLK, of the city of Chicago, in the county of Cook and State of I1li-. nois, have invented certain new and useful Improvements in Machine for Grinding and Polishing Marble andStone Columns, and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings making part of this specification, and to the letters of reference marked thereon, like letters indicating like parts wherever they occur.

.grind and polish marble and stone columns by machin ery, its nature consists in placing a roughed and pointed column in a horizontal position on suitably-constructed and adjustable carriage, and passing over the said column a metallic sleeve, cylinder, or ring, of a larger diameter than the column, which cylinder or ring, by revolving, grinds the column.

The invention consists also in a polishing-sleeve, cylinder, ring, or belt, arranged and operating as will he hereinafter fully explained.

A is a strong frame, in which carriages B B are affixed, one ofit-hem, B,sliding lengthways.

The top cdshions or blocks b b ot the said carriages slide erossways by means of dovetail and groove, and the centfis G O, for the column, are suitably journaled in plates D D, provided with cnrvilineal slots 12 d, and set-screws, E 1*),tor the purpose of adjusting the said centers in proper position.

One of the centers C is provided with cog-wheel F connected, by means of an intermediate pinion, f, with cog-wheel G and pulley H, which, by a crosshelt, h, is connected with shaft I.

The intermediate pinion f is journaled to plate J, pivoted to the stationary part of carriage B, and fixed in place by a set-screw this for the purpose of establishing connection between cog-wheels F andG, with every change in thedistance between them.

K is a column of marble, granite, or any other stone, placed between the centers and adjusted so as to have the outside line I; k parallel to the shaft I.

L isa metallic sleeve, or cylinder or ring, of a larger diameter than the column'k put over the same, having smooth surface on the inside; and flanges II on the outside.

M is a belt connecting cylinder L with the shaft I, and revolving the same. i

The whole gear is so arranged that, while cylinder L rapidly revolves in one direction, column is slowly revolves in an oppositadirection.

The belt M, when in operation, is intended to be pressed in the middle by a suitably-.ccmstructed lever in one direction, or in the other, for the purpose of allowing the cylinder L, while revolving, to travel along the column from end to end, or remain in place for. some time, thus giving the control of the rubbing cylinder L into the hands of an attendant, although I ordinary mechanical devices may be used, of such kind as to communicate automatically, to the cylinder L, the above-described rotary and long reciprocating l motion. J

N is .a water-trough, suit-ably arranged and placed over the column K.

The operation consists in this, that, after marble or stone column is roughed and pointed to shape, the rubbing-cylinder L is put on, and the column placed between the centers and adjusted, so as to have the line I; 7: parallel to the shait I.

Belt M is atfixed so asto bring a part of the inside surface of the'rubbing-cylinder suflic-iently close to the column The machinery is started, and the column is worn down to the proper size bjjsharp sand,-coarse sand, fine sand, then by grit and hone placed into the rubbing-cylinder, while it is revolving around and traveling along the column; 1

.After the rubbing process is over, the rubbing-0y -ind er is taken off, the grit and sand washedjoff, an

thepolishipg-sleeve, cylinder, or ring, or the polishing belt, is put on the column, and, if thelast is used, then it is passed over the shaft I also.

The polishing-sleeve, cylinder, or ring 0 is constructed in the same way as the rubbing device, exwin that the polishing device is inlaid inside with smooth blocks of wood, onto which a ordinary polishing-cloth is affixed, and it is ograted round the column in the same manner as-described above.

The polishing-belt P consists of an ordinary belt lined with the opolishingrcloth, and, when polishing-belt is used, then it is passed over the column and ,the shaft 1, without any cylinder or ring.

An ordinary putty polish is applied to the cloth. The polishing-cylinder or belt is used until the column is polished.

For producing moldings and other similar. orna ments, the inside surface of the ruhbing-ringmay be shaped accordingly. \i

For shaping oval columns large cylinder has to be used, while the column haste remain stationary until one side is finished, then it is turned over for finishmounted therein, and a belt passing about it and the shaft 1, to move in opposite direct-ions, as set forth.

2. A rubbing or polishing-cylinder, sleeve or ring L, constructed and arranged to be operated in the manner substantially as herein described and for the purpose set forth.

JOHN H. VOLK.

Witnesses:

J. B. Tnncmx, LEONARD W. VQLK. 

